<script lang="ts" setup>
import type { RouteLocationMatched } from 'vue-router'
import { useRouter } from 'vue-router'
import { ref, watchEffect } from 'vue'
import { Breadcrumb } from 'ant-design-vue'
import type { Menu } from '@/router/types'
import { useDesign } from '@/hooks/web/useDesign'
import { useRootSetting } from '@/hooks/setting/useRootSetting'
import { useGo } from '@/hooks/web/usePage'
import { useI18n } from '@/hooks/web/useI18n'
import { propTypes } from '@/utils/propTypes'
import { isString } from '@/utils/is'
import { filter } from '@/utils/helper/treeHelper'
import { getMenus } from '@/router/menus'
import { REDIRECT_NAME } from '@/router/constant'
import { getAllParentPath } from '@/router/helper/menuHelper'
import { Icon } from '@/components/Icon'

defineOptions({ name: 'LayoutBreadcrumb' })

defineProps({
  theme: propTypes.oneOf(['dark', 'light']),
})

const routes = ref<RouteLocationMatched[]>([])
const { currentRoute } = useRouter()
const { prefixCls } = useDesign('layout-breadcrumb')
const { getShowBreadCrumbIcon } = useRootSetting()
const go = useGo()

const { t } = useI18n()
watchEffect(async () => {
  if (currentRoute.value.name === REDIRECT_NAME)
    return
  const menus = await getMenus()

  const routeMatched = currentRoute.value.matched
  const cur = routeMatched?.[routeMatched.length - 1]
  let path = currentRoute.value.path

  if (cur && cur?.meta?.currentActiveMenu)
    path = cur.meta.currentActiveMenu as string

  const parent = getAllParentPath(menus, path)
  const filterMenus = menus.filter(item => item.path === parent[0])
  const matched = getMatched(filterMenus, parent) as any

  if (!matched || matched.length === 0)
    return

  const breadcrumbList = filterItem(matched)

  if (currentRoute.value.meta?.currentActiveMenu) {
    breadcrumbList.push({
      ...currentRoute.value,
      name: currentRoute.value.meta?.title || currentRoute.value.name,
    } as unknown as RouteLocationMatched)
  }
  routes.value = breadcrumbList
})

function getMatched(menus: Menu[], parent: string[]) {
  const metched: Menu[] = []
  menus.forEach((item) => {
    if (parent.includes(item.path)) {
      metched.push({
        ...item,
        name: item.meta?.title || item.name,
      })
    }
    if (item.children?.length)
      metched.push(...getMatched(item.children, parent))
  })
  return metched
}

function filterItem(list: RouteLocationMatched[]) {
  return filter(list, (item) => {
    const { meta, name } = item
    if (!meta)
      return !!name

    const { title, hideBreadcrumb, hideMenu } = meta
    if (!title || hideBreadcrumb || hideMenu)
      return false

    return true
  }).filter(item => !item.meta?.hideBreadcrumb)
}

function handleClick(route: RouteLocationMatched, paths: string[], e: Event) {
  e?.preventDefault()
  const { children, redirect, meta } = route

  if (children?.length && !redirect) {
    e?.stopPropagation()
    return
  }
  if (meta?.carryParam)
    return

  if (redirect && isString(redirect)) {
    go(redirect)
  }
  else {
    let goPath = ''
    if (paths.length === 1) {
      goPath = paths[0]
    }
    else {
      const ps = paths.slice(1)
      const lastPath = ps.pop() || ''
      goPath = `${lastPath}`
    }
    goPath = /^\//.test(goPath) ? goPath : `/${goPath}`
    go(goPath)
  }
}

function hasRedirect(routes: RouteLocationMatched[], route: RouteLocationMatched) {
  return routes.indexOf(route) !== routes.length - 1
}

function getIcon(route) {
  return route.icon || route.meta?.icon
}
</script>

<template>
  <div :class="[prefixCls, `${prefixCls}--${theme}`]">
    <Breadcrumb :routes="routes">
      <template #itemRender="{ route, routes: routesMatched, paths }">
        <Icon v-if="getShowBreadCrumbIcon && getIcon(route)" :icon="getIcon(route)" />
        <span v-if="!hasRedirect(routesMatched, route)">
          {{ t(route.name || route.meta.title) }}
        </span>
        <router-link v-else to="" @click="handleClick(route, paths, $event)">
          {{ t(route.name || route.meta.title) }}
        </router-link>
      </template>
    </Breadcrumb>
  </div>
</template>

<style lang="less">
@prefix-cls: ~'@{namespace}-layout-breadcrumb';

.@{prefix-cls} {
  display: flex;
  align-items: center;
  padding: 0 8px;

  .ant-breadcrumb-link {
    .anticon {
      margin-right: 4px;
      margin-bottom: 2px;
    }
  }

  &--light {
    .ant-breadcrumb-link {
      color: #999;

      a {
        color: rgb(0 0 0 / 65%);
      }
    }

    .ant-breadcrumb-separator {
      color: #999;
    }
  }

  &--dark {
    .ant-breadcrumb-link {
      color: rgb(255 255 255 / 60%);

      a {
        color: rgb(255 255 255 / 80%);

        &:hover {
          color: @white;
        }
      }
    }

    .ant-breadcrumb-separator,
    .anticon {
      color: rgb(255 255 255 / 80%);
    }
  }
}
</style>
